For backwards compatibility, true is interpreted as "allPlansExecution" and false as "queryPlanner". Prior to server version 3.6, aggregate() ignores the verbosity parameter and executes in "queryPlanner".为了向后兼容性，true解释为“allPlansExecution”，false解释为“queryPlanner”。在服务器版本3.6之前，aggregate()会忽略verbose参数，并在“queryPlanner”中执行。
For backwards compatibility, true is interpreted as "allPlansExecution" and false as "queryPlanner". Prior to server version 3.6, aggregate() ignores the verbosity parameter and executes in "queryPlanner".为了向后兼容性，true解释为“allPlansExecution”，false解释为“queryPlanner”。在服务器版本3.6之前，aggregate()会忽略verbose参数，并在“queryPlanner”中执行。